Charles m



(No Mode 1.

G. M. MoOAMEY 8c S. H. ROOT.

ADJUSTABLE ELEGTROLIER.

No. 518,198. Patented Apr. 10-

ATTORNEY L l: .1. i lllllllillllllillll WITNESSES:

WASHINGTON. o. c.

NIT-ED STATES PATENT OFFICE.

CHARLES M. MOOAMEY AND SEBRA H. ROOT, OF LONGMONT, COLORADO, ASSIGNORSTO NEVADA L. ROOT, OF SAME PLACE.

ADJUSTABLE ELECTROLIER.

C rIcATIor! forming part of Letters Patent No. 518,198, dated April10,1894. Application filed December 5,1893. smart. 492.884.. (to model.)

To aZZ whom it may concern.-

Be it known that we, CHARLES M. MOOAMEY and SEBRA H. ROOT, citizens ofthe United States of America, residing at Longmont, in the county ofBoulder and State of Colorado, have invented certain new and usefulImprovements in Adjustable Electroliers; and we do declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and tothe figures of reference marked thereon, which form a part of thisspecification.

' Our invention relates to improvements in ad ustable electroliers, andthe same consists of the features, arrangements and combinationshereinafter described and claimed, all of which will be fully understoodby reference to the accompanying drawings, in which is illustrated anembodiment thereof.

.In the drawings, Figure 1 is an elevation of the device, shown on asmall scale. Fig. 2 is a vertical longitudinal section of the same shownon a larger scale.-

Similar reference characters indicating corresponding parts or elementsof the mechanisms 1n the several views, let the numeral 5 designate, aninsulating block made fast to the ceiling of the room or other suitablesupport, and provided with two apertures 5 through which pass the wires6 and 6 respectively, leading from the main circuit and connectedrespectively with the contactplates 7 and 7 by means of binding screws8. The plates 7 and 7 a are composed of some material forming a goodconductor for the electric current, preferably metal; hence the termsmetal and metallic in this specification are employed in a broad sense,as designating any good electrical conductor which may be suitable,practicable or desirable. The plates 7 and 7 engage the block 5 to whichthey are made fast, and are insulated from each other by a,

depending projection 5 forming a part of said block. These plates alsosurround and engage the upper extremities of the metallic tubes 9 and 9respectively, the plates and tubes being so connected as to form a goodelectrical contact. The tubes 9 and 9 are ofany suitable length,depending upon the degree of vertical adj ustability required. Theirlower extremities are embedded in insulating disks 10, and the tubes aresurrounded throughout their length by some suitable insulating material12 which extends from the disks-10 to the insulating rings 12 whichengage the plates 7 and 7 a and overlap the upper extremities of theouter stationary tubes 13 which surround or inclose the insulatingcovering 12 of the tubes 9 and 9, their lower extremities also beingembedded in the insulating disks 10. The tubes 13 are thus thoroughlyinsulated from the tubes 9, 9 and the plates 7, 7 The insulating disks10 are contrally apertured to receive the sliding metallic rods 14; and14: which pass through apertures formed in the insulating base 15 towhich the rods are attached by nuts 16 screwed upon the rods andengaging the base 15 .both above and below. The upper extremities of therods 14 and 14: are each provided with a plural number of contactsprings or metal brushes 17 made fast to a metal block 18 swiveled onthe rod. These brushes or springs 17 are located on diametricallyopposite sides of their reengages the'right hand thread of the same. IThese nuts are located between the spring contact brushes, and theirfunction is to maintain those brushes in proper contact with the tubes 9and 9 The nuts are adjusted and the pressure upon the tubes increased ordiminished by turning the rods 14 and 14*, whereby the nuts are made tosimultaneously recede from or approach the blocks 18. As 5 the springs17 grasp the nuts, the latter are prevented from turning with the rods,the springs being prevented from turning by reason of their engagementwith the tubes. The

device is further provided with two outer IOO tubes 19, which are madefast to the base 15 at their lower extremities by means of screws 20.These tubes 19 extend upward from the base around the stationary tubes13, which telescope therein, and are of such length as to form asuitable casing for the rods 14 and 14 when the latter are drawndownward to their limit of movement.

We have illustrated in the drawings, a two lamp electrolier.

Let the numeral 21 designate the tubes forming the casing for theconductors leading to the lamps. The inner extremities of these tubesare made fast to the lower extremities of the hangers 22, the upperextremities of the latter being screwed to the insulating base 15. Thewires 23 and 24 connected with each lamp are respectively attached tothelower extremities of the rods 14 and 14:.

In describing the path of the current, it may be assumed that it entersthrough wire 6 at the top of the device, and passes thence throughcontact 7, tube 9, spring contacts 17, rod 14 and wire 23 to the lamp;and thence through wire 24 to rod 14 the spring contacts 17, the tube 9the contact plate 7, and out through the wire 6 to themain circuit.

The lower part of the device is inclosed by a suitable casing 25supported upon the base 15 bya threaded rod 26 which passes through anaperture formed in the center of the base, and is adjustable by means ofa nut 27 en gaging the lower surface of the base. -The upper extremityof the device is inclosed by an ornamental casing28 engaging the ceilingor other support, and made fast to the stationary tubes 13. The lowerpart of the device, or that part to which the lamps are attached, may beraised and lowered at will, there being sufficient friction between thecontact brushes 17 and their engaging tubes to maintain the lamps, ormovable part of the device, in any desired position of verticaladjustability. It will thus be seen that the brushes 17 have twofunctions, namely; the one, the forming of a perfect electrical contactbetween the rods and the tubes; and the other, the causing of sufficientfriction with the tubes to maintain the lamps in any desired position inwhich they may be placed.

It will be observed that in the operation of the mechanism, theinsulating disks 10 form stops for the contact springs 17, and thusprevent the rods from drawing out of the tubes 9 and 9.

Having thus described our invention, what we claim is- 1. In anadjustable electrolier, the combination of two depending metallic tubesmade fast to a suitable support and insulated from each other, the feedwires respectively connected electrically with the tubes, movable rodsprovided with spring contact brushes at their upper extremities, therods telescoping within the tubes which are engaged by the brushes, aninsulating base connectlng the lower extremities of the rods, and thelamp wires respectively attached to the rods, substantially asdescribed.

2. In an adjustable electrolier, the comb nation of the dependingstationary metallic tubes insulated from each other and connected withthe feed wires, the metallic rods telescoping within the tubes andprovided with adjustable spring contact brushes, the outer stationarytubes insulated from the inner tubes,theinsu1ating base connecting therods, and the lamp wires respectively connected with the rods,substantially as described.

3. In an adjustable electrolier, the combination of thestationaryinsulating block, the metallic contact plates attached to theblock and insulated from each other, the feed wires leading to theseplates, the depending metallic tubes respectively connected with thecontact plates, the outer stationary tubes insulated from the innertubes, the telescoping metallic rods provided with the spring contactsengaging the inner tubes, the insulating base block connecting the rodsand 1nsulating them from each other, the outer tubes attached to thebase block and inclosing the rods, and the lamp wires respectivelyconnected with the rods, substantially as described.

4. In an adjustable electrolier, the combination of the dependingstationary metallic tubes insulated from each other, the feed wiresconnected therewith, the telescop ng metallic rods the upper extremitiesof which are provided with right and left threads, spring contactbrushes attached to these rods and engaging the tubes, spreading nutsscrewed upon the rods and engaging the brushes, suitable means forconnecting and insulating the lower extremities of the rods, and thelamp wires respectively connected with the rods, substantially asdescribed.

In testimony whereof we affix our signatures in the presence of twowitnesses.

CHARLES M. MOCAMEY. SEBRA H. ROOT.

Witnesses:

J. K. SWEEMP, W. L. MOOAsLIN.

